I should have done the power connector swap from h520e to first gen h520 after the first melt down. 13 flights all good battery heads not even hot just warm after flight. first 8 flew no payloads times hover 35 to 25 min 35 with gifi h480 8000mha 32min venom 7900mha 28 oem yuneec h520 25 good old trust ultra x 6300 h480. next 4 flights average 6 land miles in air 2yuneec oem first gen h520 28min 2 ultra x 6300mha h480 24min. next 9 e90 average 5 min less than no payload with yuneec oem first gen h520. and ultra x h480 6300mha. no payload full data pilot options and mission planning with perfect execution. orbit now are 2 mile diameter. bonus all calibrations minus gimbal can be done fully with out payload on the 2nd gen h520e. need to do one more set of flights before ordering the h520ertk version and changing that battery connector as well.